Android 4.2.1 along with its source were released today, but outside of the December bug in the People app, it wasn't immediately apparent whether it contained other fixes and improvements or not. The list of files touched by the Nexus 4 OTA was extensive, but now thanks to developer Al Sutton, we can confirm that most of those were probably just minor edits to bump the version number.

According to Al and his handy AOSP diff script, here are the only changes in Android 4.2.1 (4.2.1_r1) open source code compared to Android 4.2 (4.2_r1). Note: There could be other changes in closed-source components.

JOP40C (4.2_r1) to JOP40D (4.2.1_r1) AOSP changelog

This only includes the Android Open Source Project changes and does not include any changes in any proprietary components included by Google or any hardware manufacturer. The raw log was generated using a modified version of this script written by JBQ.

And there you have it - Android 4.2.1 is probably one of the most minor, yet necessary, updates ever pushed out by Google in a point release. Another mystery solved, now we can concentrate on finally getting that Nexus 4 ordered, this time, hopefully, without Google's servers melting down.

Comments

Same here. My N10 has randomly rebooted a few times, although it's not that bad because it doesn't do it when I'm actively using it (only when it's locked for a period of time).

MrJigolo

THIS. Why the hell hasn't Google addressed this? My Nexus 10 reboots all the time while in idle. It's really annoying and that's a good way to kill the battery. I wish someone from AndroidPolice would show Google some of these problems.

Mario

Have you tried a factory reset? Similar thing was happening to people going to from 4.1 to 4.2 on the N7, but a factory reset fixed it. Could also be some of your old apps not playing well with 4.2, since the N10 comes stock with 4.2, no?

Well the only issue I have is that sometimes I press the power button when device is sleeping and the screen lights up but nothing is shown.

Had that more than 6 times today.

Trey

I can name a couple.

On my Nexus 7, the touchscreen is unresponsive when plugged into the charger. However, putting it to sleep and waking it temporarily brings it back to life. This has been an issue from the beginning.

Secondly, I noticed a lot of skipping in Google Music when using Bluetooth. However, disabling then reenabling Bluetooth seems too temporarily correct that issue. This issue only came about after upgrading to 4.2.

My N4 screen behaved a bit flaky on charger too before I got the last two updates. Mostly when I tried to two finger the settings shade from the top. It almost never worked, dropped the sensing and then launched whatever my finger was over when it began sensing again. Not so much a problem with the standard one finger shade. It's seemed to be a multi tough issue. I'm on 4.2.1 now

Simon Belmont

I got my N7 the DAY before 4.2 dropped. The UI was smoother in 4.1 and battery drain was better.

Is it possible that this also fixes our issues with Gmail's new messages vibrating in disregard of our settings?

Nelson

What's with the commit saying [DO NOT MERGE]? Am I misinterpreting this, or didn't they merge it if it showed up in the changelog?

akellar

That comment is all over the place in AOSP.

blunden

Someone from Google explained it in some comment on Google+. It might've been Adam Powell. Unfortunately I don't remember specifically what he said but I think it was related to how to handle the commit in their internal tree or something like that. Regardless, it's quite common in AOSP for new platform releases and it is not related to any form of mistake.

Sven79

I sure wish they'd have shipped my "pending"order before taking new orders

Faiz Visram

Anyone thinking that the new Bluetooth compatibility might fix native support for the Wii controller?

Jared Morgan

It fixes support for apps like USB/BT Joystick Center apparently.

ericl5112

Did they also remove the LTE option from the N4? I expect that to go very soon.

Well that's lame. Missing december only in a few specific cases was probably the least important bug in 4.2, yet the only one which was fixed :(

GregMG

Nothing on my N7 yet.

Pete

Nexus 4 isnt supported yet in AOSP so fixes specific to it likely won't be mentioned. There was a patch in the OTA for NFC that is larger than the other patch files. I notice Mifare classic 1k tags are nownable to be read and wrtten.

Rene Christensen Dokbua

Bummer. I had hoped for a fix for the low volume problem.

thargic

Factory re-set fixed my random booting problem

Fredrik

I had a lot o crashes and reboots. Reverting to using only one user account removed most of them for me. The multi user support seems really buggy.

RedColoredGlasses

This was the same for me. When I deleted the second user account, much of the lag went away. I still get the occasional reboot, but I can deal with that. (Nexus 7 User BTW)

aerialie

I got this update and can now watch videos that were previously unavailable to me on Nexus 7.

Marc

Has voice recognition improved for dialing? That really needed some work.